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345295c0d9
The sched_getparam call is also replaced with a INTERNAL_SYSCALL_CALL to avoid clobbering errno. Also return EINVAL if the thread is already terminated at the time of the call. Checked on x86_64-linux-gnu.
79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
/* Copyright (C) 2002-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <libc-lock.h>
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#include <kernel-posix-cpu-timers.h>
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#include <pthreadP.h>
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static int
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getschedparam (struct pthread *pd, int *policy, struct sched_param *param)
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{
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int r = 0;
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/* See CREATE THREAD NOTES in nptl/pthread_create.c. */
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lll_lock (pd->lock, LLL_PRIVATE);
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/* The library is responsible for maintaining the values at all
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times. If the user uses an interface other than
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pthread_setschedparam to modify the scheduler setting it is not
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the library's problem. In case the descriptor's values have
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not yet been retrieved do it now. */
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if ((pd->flags & ATTR_FLAG_SCHED_SET) == 0)
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{
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r = INTERNAL_SYSCALL_CALL (sched_getparam, pd->tid, &pd->schedparam);
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if (r == 0)
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pd->flags |= ATTR_FLAG_SCHED_SET;
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}
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if ((pd->flags & ATTR_FLAG_POLICY_SET) == 0)
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{
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r = pd->schedpolicy = INTERNAL_SYSCALL_CALL (sched_getscheduler, pd->tid);
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if (r >= 0)
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pd->flags |= ATTR_FLAG_POLICY_SET;
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}
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if (r >= 0)
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{
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*policy = pd->schedpolicy;
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memcpy (param, &pd->schedparam, sizeof (struct sched_param));
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}
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lll_unlock (pd->lock, LLL_PRIVATE);
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return -r;
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}
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int
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__pthread_getschedparam (pthread_t threadid, int *policy,
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struct sched_param *param)
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{
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struct pthread *pd = (struct pthread *) threadid;
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/* Block all signals, as required by pd->exit_lock. */
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internal_sigset_t old_mask;
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internal_signal_block_all (&old_mask);
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__libc_lock_lock (pd->exit_lock);
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int result = pd->tid != 0 ? getschedparam (pd, policy, param) : EINVAL;
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__libc_lock_unlock (pd->exit_lock);
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internal_signal_restore_set (&old_mask);
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return result;
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}
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libc_hidden_def (__pthread_getschedparam)
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strong_alias (__pthread_getschedparam, pthread_getschedparam)
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